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US 2003/0199665 A1Published application
Process for producing polycarbonate
OwnerTakato Kimura, Satoru Minami +1inventors
InventorsTakato Kimura, Satoru Minami, Tomaki Shimoda
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Abstract
A method for manufacturing polycarbonate comprises: measuring a molar ratio of a carbonic acid diester to a dihydroxy compound in a reactor system using an online analyzer; controlling a supply of at least one of the dihydroxy compound and the carbonic acid diester to the reactor system so that the measured molar ratio is maintained within a selected range; and reacting the dihydroxy compound with the carbonic acid diester to produce the polycarbonate.
Claims22
A method for manufacturing polycarbonate, comprising:
- measuring a molar ratio of a carbonic acid diester to a dihydroxy compound in a reactor system using an online analyzer;
- controlling a supply of at least one of the dihydroxy compound and the carbonic acid diester to the reactor system so that the measured molar ratio is maintained within a selected range;
- and
- reacting the dihydroxy compound with the carbonic acid diester to produce the polycarbonate.
1 more element
Dependencies are inferred from the claim text.